/Engine/Source/Editor/GameProjectGeneration/Public/AddToProjectConfig.h
The parent window the dialog should use, or null to choose a suitable default parent window (the main frame, if available).
[FAddToProjectConfig](API\Editor\GameProjectGeneration\FAddToProjectConfig) & ParentWindow ( const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) > & InParentWindow )